Elizabeth Police have released a mugshot of the 28-year-old man arrested for sexually assaulting three girls -- who are sisters -- saying more victims exist, and asking for the public's help.

Juan Carlos Castillo Ponce was arrested Feb. 26, after one of the victims, who is 13, told her parents about what had happened, Sgt. John Maloney said today.

Police believe the attacks may have taken place over the course of several years, while the man had been renting a basement apartment in the girls' parents home.

Authorities have recovered hundreds of DVD recordings they say Castillo Ponce made of the assaults, which include other girls, possibly friends or family of the victims, Maloney said.

Castillo Ponce had been living in the family's basement apartment in the 6th Street area from 2000 to 2008, and had become a trusted friend of the family, Maloney said.

He assaulted the girls, now ages 10, 13 and 16, in their home while their parents were away, authorities said. All of the girls in the videos appear to be under 10 years old, Maloney said, and one as young as 2 to 3 years old.

Authorities believe the attacks stopped in early 2008, when Castillo Ponce moved to Fords in Middlesex County.

Anyone with information about the case should call Elizabeth police Detective Christopher Kenney at (908) 558-2034.